IronPython example to use Microsoft Font Validator's internals to get at font creation and modification times.

headtime-example.py

# Usage:
#     mono ipy.exe this_script.py <fontfile1> <fontfile2> ...

# Copyright (c) Hin-Tak Leung

# Tips:
#     "mono ipy.exe -h" to get options.
#         -X:ColorfulConsole - useful on terminal with a light background
#                              (somehow forground color is hard-coded to white)

import clr
import sys

# IronPython does not have the os module, but it can use CPython's!
# NOTE: edit for your CPython's location
sys.path.append("/usr/lib64/python2.7/")
import os

# NOTE: edit "os.getcwd()" to FontVal's top location
sys.path.append(os.getcwd() + "/bin")
clr.AddReference("OTFontFile.dll")

from OTFontFile import *

class headtime:
    def __init__(self, filename):
        self.filename = filename
        self.f = OTFile()
        self.f.open(filename)
        for i in range(0, self.f.GetNumFonts()):
            fn = self.f.GetFont(i)
            tname = fn.GetTable("name")
            print tname.GetNameString()
            thead = fn.GetTable("head")
            print "\t%s" % thead.GetCreatedDateTime()
            print "\t%s" % thead.GetModifiedDateTime()

if __name__ == '__main__':
    if not sys.argv[1:]:
        print("Usage: %s fontfiles" % sys.argv[0])

    files = sys.argv[1:]

    for file in files:
        headtimeobj = headtime(file)

You need MS Font Validator, mono, ironpython (it comes with the windows version of mono definitely, and possibly also the mac OS version); CPython is optional, and only needed for the os module to set the current path if you are sitting at the top of FontVal's directory.